Hey, today I was at Patric's again. I showed him "Arthur Spiderwick's Field Guide" by Tony DiTerlizzi and Holly Black, an album stylized on an old sketch-book with descriptions of fantastic creatures like pixies and elves. He was fascinated.

Here you can take a look at full verison of this book:
http://books.simonandschuster.com/Arthur-Spiderwicks-Field-Guide-to-the-World-You/Tony-DiTerlizzi/The-Spiderwick-Chronicles/9781416960959/browse_inside